中国物理B ›› 2014, Vol. 23 ›› Issue (3): 30304-030304.doi: 10.1088/1674-1056/23/3/030304

• GENERAL • 上一篇    下一篇

Evolution law of a negative binomial state in an amplitude dissipative channel

陈锋a b, 范洪义b   

  1. a Department of Mathematics and Physics, Hefei University, Hefei 230022, China;
    b Department of Material Science and Engineering, University of Science and Technology of China, Hefei 230026, China
  • 收稿日期:2013-07-08 修回日期:2013-08-20 出版日期:2014-03-15 发布日期:2014-03-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11175113 and 112470009).

Evolution law of a negative binomial state in an amplitude dissipative channel

Chen Feng (陈锋)a b, Fan Hong-Yi (范洪义)b   

  1. a Department of Mathematics and Physics, Hefei University, Hefei 230022, China;
    b Department of Material Science and Engineering, University of Science and Technology of China, Hefei 230026, China
  • Received:2013-07-08 Revised:2013-08-20 Online:2014-03-15 Published:2014-03-15
  • Contact: Chen Feng E-mail:chenfeng@hfuu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11175113 and 11247009).

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摘要： For the first time we derive the evolution law of the negative binomial state ?????? in an amplitude dissipative channel with a damping constant κ. We find that after passing through the channel, the final state is still a negative binomial state, however the parameter γ evolves into γ’, where γ’=γ/(e-2κt(1-γ)+γ). The decay law of the average photon number is also obtained.

关键词: negative binomial state, thermal entangled state representation, master equation for damping, Kraus operator

Abstract: For the first time we derive the evolution law of the negative binomial state  in an amplitude dissipative channel with a damping constant κ. We find that after passing through the channel, the final state is still a negative binomial state, however the parameter γ evolves into γ’, where γ’=γ/(e-2κt(1-γ)+γ). The decay law of the average photon number is also obtained.

Key words: negative binomial state, thermal entangled state representation, master equation for damping, Kraus operator

中图分类号:  (Quantum mechanics)

  • 03.65.-w
42.50.-p (Quantum optics)